If you’re wanting to use the xNT or flexNT for PC login, then I’d try the first option. It’s free and works well enough. The second option is not free, and possibly a bit less user friendly, but it will become useful in the near future with the release of VivoKey. Also, EIDAuthenticate needs a REG file to be loaded so the PC/SC system recognizes the xNT / flexNT as usable for authentication. Unzip and execute these REG files to register the proper links for x-series tags: